(in-package "SB!IMPL")
\f
-(defconstant most-positive-fixnum #.sb!vm:*target-most-positive-fixnum*
- #!+sb-doc
- "the fixnum closest in value to positive infinity")
-
-(defconstant most-negative-fixnum #.sb!vm:*target-most-negative-fixnum*
- #!+sb-doc
- "the fixnum closest in value to negative infinity")
-\f
;;;; magic specials initialized by GENESIS
;;; FIXME: The DEFVAR here is redundant with the (DECLAIM (SPECIAL ..))
be any non-negative, non-complex number."
(when (or (not (realp n))
(minusp n))
- (error "Invalid argument to SLEEP: ~S.~%~
- Must be a non-negative, non-complex number."
- n))
+ (error 'simple-type-error
+ :format-control "invalid argument to SLEEP: ~S"
+ :format-arguments (list n)
+ :datum n
+ :expected-type '(real 0)))
(multiple-value-bind (sec usec)
(if (integerp n)
(values n 0)
(multiple-value-bind (sec frac)
(truncate n)
- (values sec(truncate frac 1e-6))))
+ (values sec (truncate frac 1e-6))))
(sb!unix:unix-select 0 0 0 0 sec usec))
nil)
\f
(declare (optimize (speed 3) (safety 0))
(values (unsigned-byte 20))) ; FIXME: DECLARE VALUES?
- #!-x86 ; machines where stack grows upwards (I guess) -- WHN 19990906
+ #!-stack-grows-downward-not-upward
(labels
((scrub (ptr offset count)
(declare (type system-area-pointer ptr)
(* (floor initial-offset sb!vm:n-word-bytes) sb!vm:n-word-bytes)
0)))
- #!+x86 ;; (Stack grows downwards.)
+ #!+stack-grows-downward-not-upward
(labels
((scrub (ptr offset count)
(declare (type system-area-pointer ptr)
(defvar +++ nil #!+sb-doc "the previous value of ++")
(defvar - nil #!+sb-doc "the form currently being evaluated")
-;;; the top level prompt string, or a function of no arguments that
-;;; returns a simple-string
-(defvar *prompt* "* ")
-
(defun interactive-eval (form)
"Evaluate FORM, returning whatever it returns and adjusting ***, **, *,
+++, ++, +, ///, //, /, and -."
(let ((sysinit nil) ; value of --sysinit option
(userinit nil) ; value of --userinit option
- (reversed-evals nil) ; values of --eval options, in reverse order
+ (reversed-evals nil) ; values of --eval options, in reverse order; and
+ ; also --load options, translated into --eval
(noprint nil) ; Has a --noprint option been seen?
- (noprogrammer nil) ; Has a --noprogammer option been seen?
+ (noprogrammer nil) ; Has a --noprogrammer option been seen?
(options (rest *posix-argv*))) ; skipping program name
(/show0 "done with outer LET in TOPLEVEL-INIT")
;; READ an --eval string). Make sure that they're handled
;; reasonably. Also, perhaps all errors while parsing the command
;; line should cause the system to QUIT, instead of trying to go
- ;; into the Lisp debugger.
+ ;; into the Lisp debugger, since trying to go into the debugger
+ ;; gets into various annoying issues of where we should go after
+ ;; the user tries to return from the debugger.
;; Parse command line options.
(loop while options do
eval-as-string))
(t
(push eval reversed-evals)))))))
+ ((string= option "--load")
+ (pop-option)
+ (push `(load ,(pop-option)) reversed-evals))
((string= option "--noprint")
(pop-option)
(setf noprint t))
(setf *debugger-hook* 'noprogrammer-debugger-hook-fun
*debug-io* *error-output*))
- ;; FIXME: Verify that errors in init files and/or --eval operations
- ;; lead to reasonable behavior.
-
;; Handle initialization files.
(/show0 "handling initialization files in TOPLEVEL-INIT")
(flet (;; If any of POSSIBLE-INIT-FILE-NAMES names a real file,
;; return its truename.
(probe-init-files (&rest possible-init-file-names)
(/show0 "entering PROBE-INIT-FILES")
-
- ;; REMOVEME: commented out while compiler has problems
- #+nil
-
(prog1
(find-if (lambda (x)
(and (stringp x) (probe-file x)))
(let* ((sbcl-home (posix-getenv "SBCL_HOME"))
(sysinit-truename (if sbcl-home
(probe-init-files sysinit
- (concatenate
- 'string
- sbcl-home
- "/sbclrc"))
+ (concatenate 'string
+ sbcl-home
+ "/sbclrc"))
(probe-init-files sysinit
"/etc/sbclrc"
"/usr/local/etc/sbclrc")))
(error "The HOME environment variable is unbound, ~
so user init file can't be found.")))
(userinit-truename (probe-init-files userinit
- (concatenate
- 'string
- user-home
- "/.sbclrc"))))
- (/show0 "assigned SYSINIT-TRUENAME and USERINIT-TRUENAME")
-
+ (concatenate 'string
+ user-home
+ "/.sbclrc"))))
;; We wrap all the pre-REPL user/system customized startup code
;; in a restart.
;; Unix environment errors, e.g. a missing file or a typo on
;; the Unix command line, and you don't need to get into Lisp
;; to debug them, you should just start over and do it right
- ;; at the Unix level. Errors below here are usually errors in
- ;; user Lisp code, and it might be helpful to let the user
- ;; reach the REPL in order to help figure out what's going on.)
+ ;; at the Unix level. Errors below here are generally errors
+ ;; in user Lisp code, and it might be helpful to let the user
+ ;; reach the REPL in order to help figure out what's going
+ ;; on.)
(restart-case
- (flet ((process-init-file (truename)
- (when truename
- (unless (load truename)
- (error "~S was not successfully loaded." truename))
- (flush-standard-output-streams))))
- (process-init-file sysinit-truename)
- (process-init-file userinit-truename)
+ (progn
+ (flet ((process-init-file (truename)
+ (when truename
+ (unless (load truename)
+ (error "~S was not successfully loaded." truename))
+ (flush-standard-output-streams))))
+ (process-init-file sysinit-truename)
+ (process-init-file userinit-truename))
;; Process --eval options.
(/show0 "handling --eval options in TOPLEVEL-INIT")
(eval eval)
(flush-standard-output-streams)))
(continue ()
- :report "Continue anyway (skipping to toplevel read/eval/print loop)."
- (values)) ; (no-op, just fall through)
+ :report
+ "Continue anyway (skipping to toplevel read/eval/print loop)."
+ (/show0 "CONTINUEing from pre-REPL RESTART-CASE")
+ (values)) ; (no-op, just fall through)
(quit ()
- :report "Quit SBCL (calling #'QUIT, killing the process)."
- (quit))))
+ :report "Quit SBCL (calling #'QUIT, killing the process)."
+ (/show0 "falling through to QUIT from pre-REPL RESTART-CASE")
+ (quit))))
;; one more time for good measure, in case we fell out of the
;; RESTART-CASE above before one of the flushes in the ordinary
(flush-standard-output-streams)
(/show0 "falling into TOPLEVEL-REPL from TOPLEVEL-INIT")
- (toplevel-repl noprint))))
+ (toplevel-repl noprint)
+ ;; (classic CMU CL error message: "You're certainly a clever child.":-)
+ (critically-unreachable "after TOPLEVEL-REPL"))))
;;; read-eval-print loop for the default system toplevel
(defun toplevel-repl (noprint)
(- nil)
(+ nil) (++ nil) (+++ nil)
(/// nil) (// nil) (/ nil))
- (/show0 "about to set up restarts in TOPLEVEL-REPL")
- ;; There should only be one TOPLEVEL restart, and it's here, so
- ;; restarting at TOPLEVEL always bounces you all the way out here.
- (with-simple-restart (toplevel
- "Restart at toplevel READ/EVAL/PRINT loop.")
- ;; We add a new ABORT restart for every debugger level, so
- ;; restarting at ABORT in a nested debugger gets you out to the
- ;; innermost enclosing debugger, and only when you're in the
- ;; outermost, unnested debugger level does restarting at ABORT
- ;; get you out to here.
- (with-simple-restart (abort "Reduce debugger level (leaving debugger).")
- (catch 'toplevel-catcher
- (sb!unix:unix-sigsetmask 0) ; FIXME: What is this for?
- (repl noprint))))))
+ ;; WITH-SIMPLE-RESTART doesn't actually restart its body as some
+ ;; (like WHN for an embarrassingly long time ca. 2001-12-07) might
+ ;; think, but instead drops control back out at the end. So when a
+ ;; TOPLEVEL or outermost-ABORT restart happens, we need this outer
+ ;; LOOP wrapper to grab control and start over again. (And it also
+ ;; wraps CATCH 'TOPLEVEL-CATCHER for similar reasons.)
+ (loop
+ (/show0 "about to set up restarts in TOPLEVEL-REPL")
+ ;; There should only be one TOPLEVEL restart, and it's here, so
+ ;; restarting at TOPLEVEL always bounces you all the way out here.
+ (with-simple-restart (toplevel
+ "Restart at toplevel READ/EVAL/PRINT loop.")
+ ;; We add a new ABORT restart for every debugger level, so
+ ;; restarting at ABORT in a nested debugger gets you out to the
+ ;; innermost enclosing debugger, and only when you're in the
+ ;; outermost, unnested debugger level does restarting at ABORT
+ ;; get you out to here.
+ (with-simple-restart
+ (abort
+ "Reduce debugger level (leaving debugger, returning to toplevel).")
+ (catch 'toplevel-catcher
+ #!-sunos (sb!unix:unix-sigsetmask 0) ; FIXME: What is this for?
+ (repl noprint)
+ (critically-unreachable "after REPL")))))))
(defun repl (noprint)
(/show0 "entering REPL")
;; FIXME: It seems bad to have GC behavior depend on scrubbing the
;; control stack before each interactive command. Isn't there some
;; way we can convince the GC to just ignore dead areas of the
- ;; control stack, so that we don't need to rely on this
- ;; half-measure?
- (/show0 "at head of LOOP")
+ ;; control stack, so that we don't need to rely on this half-measure?
(scrub-control-stack)
- (/show0 "back from SCRUB-CONTROL-STACK")
(unless noprint
(fresh-line)
- (/show0 "back from FRESH-LINE")
- (princ (if (functionp *prompt*)
- (funcall *prompt*)
- *prompt*))
- (/show0 "back from PRINC")
- (flush-standard-output-streams)
- (/show0 "back from FLUSH-STANDARD-OUTPUT-STREAMS"))
+ (write-string "* ") ; arbitrary but customary REPL prompt
+ (flush-standard-output-streams))
(let ((form (read *standard-input* nil eof-marker)))
- (/show0 "back from READ")
- (if (eq form eof-marker)
- (quit)
- (let ((results (multiple-value-list (interactive-eval form))))
- (unless noprint
- (dolist (result results)
- (fresh-line)
- (prin1 result)))))))))
+ (cond ((eq form eof-marker)
+ (/show0 "doing QUIT for EOF in REPL")
+ (quit))
+ (t
+ (let ((results (multiple-value-list (interactive-eval form))))
+ (unless noprint
+ (dolist (result results)
+ (fresh-line)
+ (prin1 result))))))))))
(defun noprogrammer-debugger-hook-fun (condition old-debugger-hook)
(declare (ignore old-debugger-hook))
(flet ((failure-quit (&key recklessly-p)
+ (/show0 "in FAILURE-QUIT (in noprogrammer debugger hook)")
(quit :unix-status 1 :recklessly-p recklessly-p)))
;; This HANDLER-CASE is here mostly to stop output immediately
;; (and fall through to QUIT) when there's an I/O error. Thus,